Transforming die



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March 30, 1937. B. BURVENICK Filed Feb. 20, 1936 INVENT R ill? 1' 622104T R EYS M ww I U IM \\\\\\\\k l atented Mar. 30, 1937 BenjaminBurvenick,

assignor tion. New York, York Application February 20, 1936, Serial No.

9 Claims.

Thisv invention relates to a shaping device or die by which hollowmetallic blanks are shaped or transformed into articles of differentforms, and which serves adequately for producing The principal object ofthe vision of means suitable transforming blanks of while cold, intoarticles of any desired size and shape or form with a neat finish andappearance.

A further object of the invention is the pro vision of a device of theindicated character which is simple, easily operated and of efficientand substantial design.

The nature of the invention and its distinguishing features andadvantages will appear when the specification is read in conjunctionwith the accompanying drawing, in'which Figure l is a Vertical sectionshowing the features of the invention, a blank being shown in positionpreparatory to being forced into the die;

Fig. 2 is a view similar to Fig. l but showing the blank forced into thedie and the plunger in operation; H 5 Fig. 3 is a View similar to Fig. lbut showing the plunger in action exerting pressure on the conformablesubstance in the blank to complete the transformation into an article ofthe desired shape;

Fig. 4 is a section on the line 4-4 of Fig. 1;

Fig. 5 is a view looking down on the plunger;

Fig. 6 is a top view of a blank used for producing a certain article;

Fig. 7. is a top view of an article produced from U the blank shown inFig. 6 by the use of the invention.

Referring now more particularly to the several views of the drawing, itwill be apparent that in accordance with the invention use is made of adie Ill in the form of a block. The. block has a cavity or recess lltherein conforming to the exterior contour of the article to be formed.The block has a groove l2 to accommodate suitable clamps l3whichposition the block to the'bed M of a double-action press, In the presentinstance the cavity or recess H is square with round corners. :Thebottom of the cavity or recess H maybe defineclby a removable section l5constituting a part of the die, said section being dished so as toprovide a rounded bottom to the article to be formed. Use is made of apressure element It which is movable up and down with respect to the dieIll. The element l6 consists of a plate section 1.1 which is hori- 55zontally disposed and pressure sections l8 which invention is the proforquickly and cheaply the indicated character,

Richmond Hill, N. Y.,

to Lalance & Grosjean Corpora- N. Y., a corporation of New are suspendedfrom the section I! on the under side thereof so as to be movable intoand out of pressureeexerting position. Each of the sections i8 is of U'shape in horizontal section, as shown most clearly in Fig.4. pended formovement by means Each section 18 is susof a pivot l9 whose oppositeends are secured or journaled in lugs 22 respectively section II.opening 2| therein pressure element 22 The element 22 on the under sideof the plate The plate section I! has a square to accommodate a secondin the form of a plunger.

is movable up and down by any suitable means forming a part of thepress. The

element or plunger transverse section with round cated in Fig. 5. Thebrought together in horizontal corners, as indipressure sections l8 whenpressure-exerting relation- 22 is square in ship constitute a hollowstructure, the interior of which is square with rounded corners and theinternal area thereof of the opening 2i and 22. The bottom of beingsmaller than the area also the area of the element the element 22 isround at the four sides to conform to the ,shape of the forming surfaceof the die section downward movement element It has come on the upperinner edge 18, causing them to move on their I5. In the of the element22 after the to rest, the element 22 acts portions of the sectionspivots l9 to positions at right angles to their pressure-exertingpositions.

In the present instance use is made of a blank 23 of metal, the samebeing cylindrical and having a bottom rounded. at the cylindrical wallof the blank. The blank body. In accordance with order to transform theblank of a vessel or, hollow the invention, in

23 is therefore in the form into an article, such as a cooking utensil,of the desired shape, the blank 23. is filled with a suitableconformable substance 24. which in the present instance is wax.

jected to pressure forces evenly in all directions.

zontal cross-sectional the cavity or recess l The operation of Thesubstance 24 when subthe walls of the blank 23 The blank used inhorisize is larger than that of l in the die 10.

the device is as follows. A

blank 23 of the indicated character filled with wax or equivalentsubstance is die I ll in registry with pressure elements It and 22 arethe pressure sections placed on top of the the cavity or recess l l. Theboth elevated and I8 of the element It are engaged with the upper end ofthe blank 23 as indicated in V Fig. l.

The pressure element It is then brought downwardly which exerts an theblank 23 forcing the H nearly but not all the endwise pressure on sameinto the recess way in, whereupon the element l6 comes to rest. Thepressure element 22 moves downwardly causing the sections l8 to swingoutwardly out of engagement with the blank 23. The element 22 continuesto move downwardly so as to exert pressure on the substance 24 causingthe blank to move fully into the recess H and, at the same time,transforming the shape of the blank to conform to the contour of therecess H, thereby producing a hollow vessel square in' cross sectionwith rounded corners, as. illustrated in Fig. '7, and with a fiat bottomexcept at the four sides the same being rounded at these points. Thebottom section I5 of the die may be pushed upwardly by reason of theopening 25 in the bed I 4 so as to remove the formed article from thedie.

Attention is called to the fact that the pressure sections l8 whenbrought together provide means to effectively bear down on thecylindrical wall of the blank due to the fact that the interior shapethereof is different from the shape of the blank, the former beingsquare While the latter is round. This makes it necessary to swing thesections l8 outwardly after they have forced the blank into the diecavity, to provide clearance for the plunger 22, in order that thelatter may complete the transformation of the blank into the finishedarticle A.

I claim:

1. A transformng device comprising a die having a recess conforming tothe exterior contour of the article to be formed, a pressure elementmovable with respect to the die and having movable means which in normalposition serve to engage and force a hollow blank filled withconformable substance into said recess, and a second pressure elementmovable with respect to said die and said pressure element which acts onsaid means to move the same out of engagement with said blank, and alsoto exert pressure on said substance while said blank is in said recess,to transform the blank into an article approximating the shape of saidrecess.

2- In a transforming device, a movable pressure element having anopening therein, and also having movable pressure sections at saidopening pivoted thereto, said sections being engageable with a blank toforce the same into a die recess upon the movement of said element withrespect thereto, and means movable through said opening to cause themovement of said sections out of engagement with said blank.

3. In a transforming device, a movable pressure element having anopening therein, and also having movable pressure sections pivoted atsaid opening, said sections being engageable with a blank to force thesame into a die recess upon the movement of said element with respectthereto, and a plunger movable through said opening to cause themovement of said sections out of engagement with said blank and to exertpressure on said blank to cause it to conform with the shape of saidrecess.

4. In a transforming device, a movable element consisting of a platesection having an opening, and pressure sections suspended from theunderside of said plate section at said opening and movable with respectto said plate section, said pressure sections being engageable with ablank to force the latter into a die recess upon the movement of saidelement with respect thereto, and means movable through the opening tomove said pressure sections out of engagement with said blank.

5. In a transforming device, a movable element consisting of a platesection having an opening, and pressure sections suspended fromtheunderside of said plate section at said opening and movable onhorizontal axes with respect to said plate section, said pressuresections being engageable with a blank to force the latter into a dierecess upon the movement of said element with respect thereto, and aplunger movable through the opening to move said pressure sections outof engagement with said blank.

6. In a transforming device, a movable element consisting of a platesection having an opening, and pressure sections suspended from theunderside of said plate section at said opening and movable with respectto said plate section, said pressure sections being of a crosssectionalshape different from that of a blank, said pressure sections beingengageable with said blank to force the latter into a. die recess uponthe movement of said element with respect thereto, and means movablethrough said opening to move said pressure sections out of engagementwith said blank.

7. In a device for transforming a hollow blank of one shape into ahollow article of another shape, pressure exerting sections swingableinto and out of pressure exerting positions, said sections in theirpressure exerting positions constituting a hollow structure havingcontact surfaces wider than the thickness of the wall of said blank toeffectually exert pressure on the upper end of the wall of said blank,and means for moving said pressure exerting sections out of engagementwith said blank.

8. In a transforming device, a movable pressure element having anopening therein, and also having movable pressure sections pivoted atsaid opening, said pressure sections being engageable with a blank toforce the same into a die recess upon the movement of said element withrespect thereto and a plunger .movable through said opening to pivotsaid pressure member out of engagement with said blank and to exertpressure on said blank to transform into the shape of the recess.

9. A transforming device comprising a die having a recess conforming tothe exterior contour of an article to be formed, a pressure elementmovable with respect to the die and having movable seating means pivotedto the bottom thereof, and adapted to seat a hollow blank into saidrecess, a plunger movable through said pressure element to disengagesaid seating means and to exert pressure on said blank to conform it tothe shape of said recess.

BENJAMIN BURVENICK.

